Oregon photographer Don Conrad @ Paris Photography is well-respected and pays well for first-timers (usually young local 'models') to pose nude. The girls will of course claim it's artistic. Nudes by any other name will still stir the loins. There also the typical models in late twenties (the desperate ones) who foregoes previous non-nudity rule when they reached a certain age. When body starts to go south on them and posing nude is some sort of preservation ritual etched into a tangible memory album for future reflections (yep...I'm so high right now).